Originally Posted by samTummo
Iíll try that when I get back this evening. What doesnít make sense to me is Iím sure the 12v outlet only has one source to feed it. So no mater what it is coming from the battery bank.
However, with the generator running, the converter is supplying a higher voltage to the batteries in order to charge them, possibly as high as 14.4 volts. This voltage is also maintained by the converter even with system load applied. When you turn off the generator, the converter will stop supplying that higher voltage, and your battery voltage will drop to about 12.9 volts with no load on it. Apply load to the battery and it will drop with the amount of load on the system. So you may be looking at a source voltage down in the 12 volt range.
Now you have to take into account voltage loss through the wire to the inverter. With the converter supplying as high as 14.4 volts to the battery connection of that wire, you may be seeing 12 volts at the end of the wire run to the inlet of the inverter. Turn off the converter (stop the generator), and you get closer to 12 volts at the battery connection of that wire, now the voltage loss in the wire might drop you down to below the specified input voltage of the inverter.